• Country
• Denmark

• Manufacturer / Brand
• Disa Elektronik A/S; Copenhagen

• Year
• 1964 ??

• Category
• Audio Amplifier or -mixer

• Radiomuseum.org ID
• 283066

Click on the schematic thumbnail to request the schematic as a free document.

• Number of Transistors
• 7

• Semiconductors
• 2G309 2N1309 2N1309 2N526 2N1168 2N1168 2N1168

• Main principle
• Audio-Amplification

• Wave bands
• - without

• Power type and voltage
• Alternating Current supply (AC) / 110, 220 Volt

• Loudspeaker
• - For headphones or amp.

• Material
• Metal case

• from Radiomuseum.org
• Model: Microphone Amplifier 91B27 - 91B28 - 91B29 - Disa Elektronik A/S;

• Shape
• Rack

• Dimensions (WHD)
• 45 x 113 x 270 mm / 1.8 x 4.4 x 10.6 inch

• Notes

• Trensistorized microphone amplifier from the DISA 19B series. (91B27 and 91B29 are line level amplifiers with higher input impedance). Transistorized, direct replacement for the TAB V-72 modules. Designed for installation in standard DIN rack in broadcast mixing desks. 

  This amp has built-in power supply (110/220V) and can be hot-swapped by the user in case of failure, even when the studio is on-air. 

  3 step gain control in front panel (6dB steps)

• Literature/Schematics (1)
• - - Manufacturers Literature (complete sercive manual for Disa 91 series mic/line amplifiers)

• Author
• Model page created by Matti Adolfsen. See "Data change" for further contributors.

• Other Models

• Here you find 11 models, 9 with images and 5 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Disa Elektronik A/S; Copenhagen